Why not call up Definitive Technology. You are going to need their help any way to figure out specifically which tweeter is in there

I have replaced tweets on other speakers. Generally it involved some screw drivers and soldering iron

I am pretty familiar in the process in general for these things. This in particular, it is not moving even after removing all relevant screws. I want to be cautious, and if there is any special process needed for this specific speaker.

As I said, it seems as if it is glued in addition to the screws. I do not want to scratch trying to use too much force. May be there is some simple way.